Bobbin carrier for braiding machines



Aug. 31, 1948. P. L. HOBOURN ET AL I BOBBIN CARRIER FOR BRAID INGMACHINES FIG.2.

Filed Jan. 22, 1947 FIG. I.

FIG.3;

Patented Aug'. 31, 1948 BOBBIN CARRIER FOR BRAIDING MACHINES PercivalLeonard Hobourn, Learnington Spa, and William Henry Joy, Coventry,England Application January 22, 1947, Serial No. 723,534 In GreatBritain March 25, 1946 3 Claims.

1 This invention comprises improvements connected with bobbin carriersor Wanderers for braiding machines and has for its object to providemeans whereby the thread tensioning means and ratchet operatingmechanism is more fully protected from damage and fiuffing than has beenproposed in the past.

Referring to the accompanying drawings:-

Figure 1 is a view in elevation of a bobbin carrier according to thepresent invention with the thread tensioning means thereof suitablysectioned to reveal the mechanism.

Figure 2 is a view in the direction of the arrow A of Figure 1.

Figure 3 is a plan view.

Figure 4 is a sectional view taken on the line ti I of Figure 1 andFigure 5 is a fragmentary sectional view of a method of attachment ofthe closure member to the outer casing.

Referring to the drawings, the carrier includes the usual base I whichis movable in guide ways in the braiding machine in the usual manner.Projecting upwardly from this base is a spindle 2 on which is mountedthe bobbin 3, this bobbin being formed with the usual ratchet teeth 4 at.the lower end thereof. Mounted on the lower end of the spindle 2 is apivoted lever 5, one end of which is formed as a pawl 6 and is adaptedto engage the ratchet teeth 4 formed on the lower end of the bobbinspool 3.

Also mounted in the beforementioned base I is a vertical post I, mountedon said vertical post I is a compression spring 8 one end of which abutsagainst a thread tensioning weight 9 hereinafter referred to, whilst theupper end of said spring is adapted to abut against the closure memberIt hereinafter referred to. The lower end of a slotted tubular member II is provided with a hole I2 engaged by a lug I3 formed on thebeforementioned lever 5 at the other end of said lever to the pawl 6.

Surrounding the slotted tubular member II is a tubular casing I4 whichhas a longitudinal slot I5 formed therein in which casing the slottedtubular member II is adapted to slide, and on which is slidably mountedthe thread tensioning weight 9. The upper end of the slotted tubularmember I I is formed with an abutment I 6 against which is adapted toabut the lower end of a second compression spring I! which is positionedconcentric with the first mentioned thread tensioning spring 8 on thevertical post I, said spring I! being of a different tension to thefirst mentioned spring 8.

The closure member I0 is preferably provided with a pin I8 which isadapted to engage a bayonet slot I9 communicating with the longitudinalslot I5 in the beforementioned tubular casing I4, or is provided withsome other retaining device to retain said springs 8 and I! in positionwithin the casing I4.

In the example shown, a collar 20 in the closure member II] is loaded bythe spring 2i and engages the top of the vertical post 'I and forms abearing for the upper ends of the springs 8 and H. The spring 2| alsoprovides spring loading for the bayonet attachment of the closure memberII] to the casing I4 (Figure 5).

Due to the spring 8 the tension weight 9 is urged towards abutment witha stop 22 on the lower end of the slotted tubular member I I. However,by means of the usual hook 23 around which the bobbin thread 24 isthreaded in the usual manner, when tension is applied by said bobbinthread to the hook 23, the weight 9 is pulled up the vertical guidepost! against the action of the compression spring 8 until such timethat the tension weight 9 engages the abutment I6 formed on the upperend of the slotted tubular member I I whereupon this member is caused toslide vertically against the action of the compression spring I1 and inturn actuates the pivoted lever 5 to move about its pivot lowering thepawled part 6 of said lever out of engagement with the ratchet teeth 4of the bobbin 3 and permitting said bobbin to rotate in the ordinaryway.

We claim:

1. Improvements in bobbin carriers for braiding machines comprising incombination a carrier base; a vertical guide post mounted on saidcarrier base; an abutment at the upper end of vertical guide post; athread tensioning compression spring co-axial with said guide post andabutting its upper end against said abutment; a thread tensioning weighthaving an extension engaging said vertical guide post which extensionabuts the lower end of said thread tensioning spring; a longitudinallyslotted casing mounted on said carrier base and co-axial with saidvertical guide post, said casing being slidably embraced by said threadtensioning weight and receiving through its slot said thread tensioningweight extension for sliding guiding engagement therewith; a secondcompression spring within said tubular casing surrounding said threadtensioning spring and abutting its upper end against said abutment; aslidable member within said tubular casing abutting its upper endagainst the lower end of said second compression spring;

and a pawl lever plvotally mounted on said carrier base for the controlof the rotation of the bobbin spool, adapted to engage the lower end ofsaid slidable member through an opening in said slotted tubular casingfor actuation by said slidable member when the latter is raised by theextension of the thread tensioning Weight engaging the upper end of saidslidable member when raised by the thread to said upper end.

2. Improvements in bobbin carriers for braid-- ing machines comprisingin combination a carrier base; a vertical guide post mounted on saidcarrier base; an abutment surrounding the upper end of said verticalguide post; a thread tensioning compression spring co-axial with saidguide g post and abutting its upper end against said abutment; a threadtensioning Weight'having an extension engaging said vertical guide postwhich extension abuts the lower end of said thread tensioning spring; alongitudinally slotted tubular casingmountedon said carrier baseandco-axial. with said vertical guidepost, said casing being slidablyembraced by said fithread tensioning weight-andreceiving through itsslot said thread tensioning Weight extension for sliding guidingengagement therewith; a closure member to the upper end of said tubularcasing adaptedto carry said abutment; .a second compression springwithin said tubular.casing'surrounding said thread tensioning spring andabutting its upper end against saidabutment; a slidable member withinsaid tubularcasingabutting its-upper end against the \lower endiof saidsecond-compression spring; and a pawl lever pivotally mountedon saidcarrier base for the :control of the rotation of the bobbin spool,adapted to engage the lower end of said s'lidable member through anopening in said slotted tubular casing for actuation by said slidablemember when the latter is raised by the extensionof the threadtensioning weight engaging the upper end of said slidable member whenraised by the thread to said upper end.

3. Improvements in bobbin carriers for braiding machines. comprising in.combination a carrier base; a vertical guide post mounted on saidcarrier base; anabutment surrounding the upper end of said verticalguide post; a thread tensioning compression spring co-axial with saidguide post and abutting its upper end against said abutment; a threadtensioning weight having an inwardly bent lug engaging said verticalguide post which lug abuts the lower end of said thread tensioningspring; a longitudinally slotted tubular casing mounted-on said carrierbase and co-axial with saidverticalguide post, said casing beingslidablysurrounded by said thread tensioning weight and receiving through itsslot said thread tensioning weight lug for sliding guiding engagementtherej with; a closure member to the upper end of said tubular casingadapted to carry said abutment; a second compression spring Within saidtubular eeasingsurrounding said thread tensioning spring and abuttingitsupper end against said abutment;

:ailongitudinally slotted tubular member slidable Withinsaid tubularcasing and abutting its upper end against the lower end of said secondcompression spring, the slot of said slidable tubular member beingaligned with the slot .of said tubular'casing and receiving saidthreadtensioning weight lug; and a pawl lever pivotallylmounted on saidcarrierbase for theicontrol of .the rotation of the bobbin, spool, adapted toengage the lower end of said s'lidable tubular member through an openingin said slotted tubular casing .for actuation by said slidabl e tubularmember when the latter is raised by the lug of the thread tensioningweight engaging the upper end of said tubular member when raised by thethread .to said upper end.

UPERCIVAL LEONARD HOBOURN.

WILLIAM HENRY oY.

rtErEaENoEe CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS GreatBritain June 30, 1932

